HFS(R) 1-2-3 Blocks, 2-Piece Precision Machinist Block Set, Hardened Tool Steel, 0.0001" Accuracy, 23-Hole 123 Blocks with Screws & Storage Case

HFS(R) 1-2-3 Blocks, 2-Piece Precision Machinist Block Set, Hardened Tool Steel, 0.0001" Accuracy, 23-Hole 123 Blocks with Screws & Storage Case

• [PRECISION 1-2-3 BLOCK SET] Includes two precision-machined 1" x 2" x 3" blocks designed for accurate setup, layout, inspection, and workholding in machining applications.
• [0.0001" PRECISION] Precision ground on all six sides with squareness accuracy of 0.0001", parallelism of ±0.0001", and matched-pair height accuracy of ±0.0001" for reliable precision work.
• [HARDENED TOOL STEEL] Made from precision-grade tool steel, heat treated and case hardened to HRC 56–60 for durability, wear resistance, and dimensional stability.
• [23-HOLE DESIGN WITH 5 THREADED HOLES] Each block features 23 holes, including 5 tapped 3/8"-16 holes, providing flexible setup and workholding options. Includes five socket-head cap screws and a hex key.
• [FOR MACHINING, SETUP & INSPECTION] Ideal for machinists, milling setups, layout work, inspection, drilling, grinding, and precision workholding. Includes a fitted storage case to keep the matched blocks and accessories organized.